code: def sdm_strip(f):
      """Remove terms with zero coefficients from ``f`` in ``K[X]``."""
      return [(monom, coeff) for monom, coeff in f if coeff]
  
imports: from itertools import permutations
  from sympy.polys.monomials import monomial_mul, monomial_lcm, monomial_div, monomial_deg
  from sympy.polys.polytools import Poly
  from sympy.polys.polyutils import parallel_dict_from_expr
  from sympy.core.singleton import S
  from sympy.core.sympify import sympify
label_desc: Use image node_id 9 for calling a global function with example usage: sdm_strip(f) and returns: unknown